ENVIRONMENT

SOLUTION

When restoring to a mailbox on Microsoft Exchange 2013

Enter the email address of the target mailbox in the To Mailbox field.

When restoring to a mailbox on Microsoft Exchange 2010 or older

Enter the alias of the target mailbox in the To Mailbox field without the domain part (UserA). Ensure that you do not to use the domain part as the Restore from Mailbox field might suggest (DOMAIN\UserA).